CODEWITHSUNDEEP
google-app-engineblob
Markus Junginger
Markus Junginger

Reputation: 7075

How to test if a blob was deleted in App Engine SDK 1.7.0 (Java)?

After updating the App Engine SDK to 1.7.0 some of our unit test started to fail.

In SDK 1.6.x I asserted that a blob was deleted like this:

    try {
        fileService.getBlobFile(blobKey);
        Assert.fail("Blob not deleted: " + blobKey);
    } catch (FileNotFoundException expected) {
        // OK
    }

In SDK 1.7.0 getBlobFile() is not throwing FileNotFoundException anymore.

I tried to provoke an exception, but it did not work out (no exception is thrown):

    try {
        AppEngineFile blobFile = fileService.getBlobFile(blobKey);
        boolean readable = blobFile.isReadable();
        FileReadChannel channel = fileService.openReadChannel(blobFile, false);
        channel.position(1);
        try {
            channel.close();
        } catch (Exception e) {
            // Silent
        }
        Assert.fail("Blob not deleted: " + blobKey);
    } catch (Exception expected) {
        // OK
    }

The blob should be deleted, but it's possible to open a channel for it...

So, any ideas how to check deletion was successful in unit testing?

Upvotes: 1

Views: 187

Answers (2)

Dave W. Smith
Dave W. Smith

Reputation: 24966

App Engine does not yet support JDK 1.7.

Upvotes: 0

Stuart Langley
Stuart Langley

Reputation: 7054

Try using blobstoreService.fetchData to retrieve the first byte of the file.

It will throw if the file does not exist.

Upvotes: 1

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